I am really having trouble answering this question, can someone help?

A binary compound between an unknown element E and hydrogen contains 91.27% E and 8.73% H by mass. If the formula of the compound is E3H8, calculate the atomic mass of E.

I think I would do this.

If the compound is E3H8, it must be E1H2.667.

91.27/atomic mass E = ??
8.73/atomic mass H = 8.73

To make 8.73=2.667, the divisor must be
8.73/2.667 = 3.27; therefore, the divisor for 91.27 must be 3.27.
91.27/3.27 = 27.9 for the atomic mass E.
I assume the compound is Si3H8.
Check my thinking.

Well, sounds like you need some help with chemistry! Don't worry, I'll do my best to assist you and bring a smile to your face while we solve this problem together.

Now, let's dive into the question and try not to get too lost in the element E's mysterious identity.

To find the atomic mass of E, we need to calculate the average atomic mass based on the percentages given.

Since we have 8.73% hydrogen (H) and 91.27% element E, we can assume that in one molecule of this compound (E3H8), there are 8 atoms of hydrogen and 3 atoms of element E.

So, to find the atomic mass of E, we'll calculate it by setting up a proportion:

(atomic mass of E / atomic mass of H) = (percentage of E / percentage of H)

Let's plug in the values we have:

(x / 1) = (91.27 / 8.73)

Now, let's cross-multiply and solve for x:

8.73x = 91.27 x 1

8.73x = 91.27

x = 91.27 / 8.73

x ≈ 10.45

Therefore, the atomic mass of element E is approximately 10.45.

I hope I could help you out with this chemistry riddle! If you have any more questions, feel free to ask and keep that curiosity going.

To find the atomic mass of element E, we can use the given percentage composition of the compound.

Step 1: Calculate the mass of the compound.

Since the compound contains 91.27% E and 8.73% H, we can assume that we have 100 grams of the compound.

Mass of E = 91.27% x 100g = 91.27g
Mass of H = 8.73% x 100g = 8.73g
Total mass of the compound = Mass of E + Mass of H = 91.27g + 8.73g = 100g

Step 2: Calculate the number of moles of E and H.

To calculate the number of moles, we need to divide the mass of each element by its molar mass.

Molar mass of E = (Mass of E) / (Number of moles of E)
Molar mass of H = (Mass of H) / (Number of moles of H)

Since we know the formula of the compound is E3H8, we can see that there are 3 moles of E and 8 moles of H.

Number of moles of E = Mass of E / Molar mass of E = 91.27g / (3 x Atomic mass of E)
Number of moles of H = Mass of H / Molar mass of H = 8.73g / (8 x Atomic mass of H)

Step 3: Obtain the atomic mass of E.

Since we know the formula of the compound is E3H8, we can equate the moles of E and H.

Number of moles of E = 3 x (Number of moles of H)

Plugging in the values we obtained, we can write the equation:

91.27g / (3 x Atomic mass of E) = 3 x (8.73g / (8 x Atomic mass of H))

Simplifying the equation, we get:

Atomic mass of E = (91.27g / (9 x Atomic mass of H)) x 8.73g

Step 4: Calculate the atomic mass of E.

To calculate the atomic mass of E, we need to know the atomic mass of hydrogen (H). Since the atomic mass of hydrogen is 1.01 g/mol, we can substitute this value into the equation above.

Atomic mass of E = (91.27g / (9 x 1.01g/mol)) x 8.73g

Calculating the value, we get:

Atomic mass of E = 88.21 g/mol

Therefore, the atomic mass of element E is 88.21 g/mol.

To calculate the atomic mass of element E, we can use the concept of weighted average.

1. Begin by converting the mass percentages to mass values. Let's assume we have 100 grams of the compound:
- E mass = 91.27% * 100g = 91.27g
- H mass = 8.73% * 100g = 8.73g

2. Determine the number of moles for each element. To do this, we need to know the molar mass of hydrogen (H) and E.

The formula E3H8 indicates that there are three atoms of E for every eight atoms of H. Therefore, the molar mass of E3H8 is:
- (3 * atomic mass of E) + (8 * atomic mass of H)

3. We will assume the atomic mass of hydrogen (H) is 1.008 grams/mol.

4. Now, let's calculate the molar mass of E3H8 using this information.
- Molar mass of E3H8 = (3 * atomic mass of E) + (8 * 1.008g/mol)

5. We can now set up an equation to find the atomic mass of E:
- E mass / molar mass of E3H8 = (3 * atomic mass of E) / [(3 * atomic mass of E) + (8 * 1.008g/mol)]

6. Substitute the known values into the equation:
- 91.27g / molar mass of E3H8 = (3 * atomic mass of E) / [(3 * atomic mass of E) + (8 * 1.008g/mol)]

7. Rearrange the equation to solve for atomic mass of E:
- (91.27g * (3 * atomic mass of E) + (8 * 1.008g/mol)) = 3 * atomic mass of E * molar mass of E3H8

8. Solve for the unknown:
- atomic mass of E = [(91.27g * (3 * atomic mass of E) + (8 * 1.008g/mol)) / (3 * molar mass of E3H8)]

Utilizing this equation, you can now substitute the values to calculate the atomic mass of element E.